Fryderyk Wiatrowski
About Fryderyk Wiatrowski
Fryderyk Wiatrowski, who also goes by Fryd, is co-founder and CEO of Viktor. Viktor is an AI coworker for Slack and Microsoft Teams. He studied mathematics and computer science at Oxford, and Crunchbase lists his degree as an MS. Before founding companies he worked at Optiver and Meta.
In 2023 he and Meta engineer Peter Albert founded Zeta Labs. Its first agent navigated websites. The team then moved to Jace, an email agent, and later built Viktor. Viktor has offices in Warsaw and Munich. In May 2026 it announced a $75M Series A led by Accel.
He has spoken at the AI Engineer conference in 2026 on enterprise AI agents.
Public records of his angel activity are limited and come mostly from other companies' round announcements. Crunchbase lists him as an investor in two 2026 rounds: the TesterArmy pre-seed and the Creem seed round. Press coverage of both rounds names him among the participating angels. He has not published a personal portfolio page or a statement of investing criteria that we could find.
TesterArmy is the AI round on the Lounge deals desk: a €1.04M pre-seed in September 2026. TesterArmy builds AI agents that test web and mobile apps by following user journeys written in plain language. Other participants in the round included Y Combinator, AIP Seed, Eight Capital and Script Capital. Angels included Guillermo Rauch of Vercel, Walden Yan of Cognition and Charlie Cheever of Expo.
He is also listed as a funding source for Creem's €5M seed round, announced in September 2026. Creem is based in Tallinn, Estonia.
The only rounds we found are an early-stage pre-seed and a seed. One is an AI developer tool and the other is a Tallinn-based startup. Both were announced in 2026. He has not publicly stated a check size, stage preference or sector thesis. His own work is in AI agents for workplace software, and he writes publicly about agents and company data security. Founders can use that background as context when they pitch. It is not a stated investment mandate.
- TesterArmy: AI agents that test web and mobile apps without test scripts. He joined the pre-seed round announced in September 2026.
- Creem: Tallinn-based startup. He is listed among the funding sources of its €5M seed round, announced in September 2026.
- Viktor: AI coworker for Slack and Teams that he co-founded and runs as CEO. This is a founder role, not an angel investment.
- Zeta Labs: AI agent company he co-founded in 2023. This is also a founder role.
- ai.engineer/speakers/fryderyk-wiatrowski
- crunchbase.com/person/fryderyk-wiatrowski
- crunchbase.com/organization/zeta-labs-b287
- finsmes.com/2026/05/viktor-raises-75m-series-a-funding.html
- vestbee.com/insights/articles/tester-army-raises-1-2-m
- vestbee.com/insights/articles/cee-funding-rounds-september-2026
- therecursive.com/yc-proven-testerarmy-raises-eur1m-for-ai-agents-that-
- xyz.pl/poland-unpacked/from-test-scripts-to-ai-agents-testerarmy-targe
Investing activity
Fryderyk Wiatrowski appears in 1 AI deal tracked by the Lounge deals desk. The rounds are mostly Pre-seed, with a median round size of $1M. The most recent is TesterArmy (Pre-seed, €1.04M, Sep 2026).
Fryderyk Wiatrowski most often invests alongside Fernando Rojo, Charlie Cheever, Walden Yan and AIP Seed, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Fryderyk Wiatrowski
Who is Fryderyk Wiatrowski?
He is co-founder and CEO of Viktor, an AI coworker for Slack and Teams. He studied mathematics and computer science at Oxford and previously worked at Optiver and Meta.
Has Fryderyk Wiatrowski invested in AI startups?
Yes. He took part in the TesterArmy pre-seed round, which was €1.04M in September 2026. TesterArmy builds AI testing agents for web and mobile apps.
What is Fryderyk Wiatrowski's angel check size?
It is not public. He has not stated a check size, and the rounds we found do not disclose individual amounts.
What stage does Fryderyk Wiatrowski invest in?
The rounds we found are a pre-seed (TesterArmy) and a seed (Creem), both in 2026. He has not published a formal stage focus.
How can founders contact Fryderyk Wiatrowski?
His public profiles are on LinkedIn and X (@fawiatrowski). He has no personal investor site that we could find, and he does not state whether he takes inbound pitches.
Is Fryderyk Wiatrowski an angel investor?
Yes. Fryderyk Wiatrowski invests personally as an angel.
What AI companies has Fryderyk Wiatrowski invested in?
Fryderyk Wiatrowski's AI investments include TesterArmy. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Fryderyk Wiatrowski invest at?
In the rounds tracked on Lounge, Fryderyk Wiatrowski has invested at Pre-seed, with a median round of $1M.
Who does Fryderyk Wiatrowski co-invest with?
Fryderyk Wiatrowski's most frequent co-investors on Lounge are Fernando Rojo (1 deal), Charlie Cheever (1 deal), Walden Yan (1 deal), AIP Seed (1 deal) and Guillermo Rauch (1 deal).
How can founders reach Fryderyk Wiatrowski?
Founders on Lounge can see Fryderyk Wiatrowski's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with them under Warm Paths, and add Fryderyk Wiatrowski to their Investor Pipeline to track the conversation.